Combined check-valve and stop-cock.



- PATENTED JULY 2, I907l I. W. STEPHENSON.

COMBINED CHECK VALVE AND STOP COCK.

APPLIOATIVOI IILBD means, 190a.

20 v I i a IRWIN w. STEPHENSON,oFnLDoN,1owA.

COMBINED OHEOK VALVE AND STOP-COCK.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed August 29,1906. Serial No. 332,491

To all whom it'may concern:

Wapollo and State of Iowa, have invented certain] new and useful Improvements in a Combined Check- Valve and Stop-Cock, of which the following is a speci; fication, reference being had therein to the accompanying drawing.

My invention relates to combined check' va'l'ves and;' stop cooks for locomotive and other engine boilers, and}:-

has for one of its objects the-providing of a device of? thecharacter described by which leakage is obviatedi and the use of which will insureproper seating of th'eg valve.

A further object of the invention isto provide a com-f bined check valve and stopcock which shall be simple and comparatively inexpensive in construction, neati. in appearance, durable and effectual in operation,

and that can be used to equal advantage'on either side; of the boiler.

A still further object of the invention is to provide ai' device of the character described v whereby the seating? '01? the valve is always insured,. and at the same time; the valve is always readily accessible and can be got at without reducing the pressure.

Other objects and advantages of. the invention,- "as Well as the structural features by which said objects are obtained will be made clear from anexamination 0f the specification taken iii-connection companying drawings, in whioh- Figure 1 is a cross section,- through the valveandpl'ug" and showing the valve in operative position in-the plug, and Fig. 2 is a'perspective view of a-val've constructed in accordance with my invention. a

In the drawings 1' designates the feed pipe which-is connected with the interiorly threaded casing or shell 2 of the stop cock by means of a coupling 3. The coupling is provided with an annular flange 4 adapted to lap over and engage an annular rimorprojection 5 on the feed-pipe, a portion of the interior of said coupling being threaded to engage corresponding threads on the shell 2 which is provided with an outlet or en haust pipe 6. A plug 7 carrying exterior threads is adapted to screw into the interiorly threaded portion of the shell, as shown, said plug having its upper end enlarged to form an aniiular shoulder 8 so that as the lower end of the plug wears away said shoulder will come down and engage the top of the shell to form a complete joint, the outer surface of the plug being flush with the outer surfaceof the shell. This plug is 1 also provided with an exterior groove 9 near its lower the shell or casing is a set screw 10 having its inner end with the ac 7: resting in the groove and bymeans of which the plug Be it known that I, IRWIN W. STErI-rENsoN, a citizen of the United States, residing atEldon, in the county oh is prevented from turning when in place in the casing.

It will be noted upon reference to Fig. 1 that the groove .9 is of suflicient width to allow for the adjustment of the plugv Into the top of the plug 7, which is interiorly threaded as at 11,v is adapted to screw a threaded cap 12, said cap having depending from the center thereof a lug or stop 13,,and theuppcr portion being adapted to recieivean ordinary wrench whereby it may "be removed or screwed into position in the top of said plug." Formedint'egral' with said cap is an-annular flange--or projection lei having anoriter edge, 15 flush with the outer edge of the plug 7 said fiange'being adapted to bear againstthe top of'the plugto form a' 4 complete joint.

.The lower part of the interior Wall of the plug is pro vided. with an inwardly projecting annular enlarge -ment 16, the upper wall 17- of which is slanted-on an angleoi about 4.5 degrees ,.and which affords a valve seatior'the valve 18 which rests thereon. This valve comprises a circular disk 19,. thejouter wall of which is inclined at an. whichfitbea ,ceived'inlthe'vplugas shown t-Fig. 1." fFo rmedfinte ral with said circular disk are depending legs ong'uides 20, 'thet1outer edges of bearilagainsl the "of the plug andtheshell, and iormediintegralw' hithe top of the disk is angilpwardly extendifigylug 21 ch, when theivalve'jis'raised in the plug, contacts the d- 'pending'lug or stop. 13 upward-movementlfoi, said valve, and the-legs 20 being of a length slightly greater than the-distance between the, lug 21 and the lug 0r'st0p 13, serve .the purpose of retaining the valve in vertical position so that as soon as the pressure against the disk 18 is removed the valve drops downinto its seat on the inclined wall 17;,

The lug 21is preferably square, as shown, lor the purpose of affording means whereby the valve may be turned with an ordinarywrench to grind in the valve seat, and is also providedwith a small hole whereby to lift the valve out of the plug with a bent wire or-other suitable means when it cannot otherwise be conveniently reached.

It will be observed that the upper rim 22 of the disk 18 is made to fit precisely in the plug so that said valve may slide up and down with precision, it being aided. in this by the legs or guides 20 which enable the plug to retain a perfectly vertical position at all times. To obtain access to the plug allithat is necessary to do is to remove the cap 12 which can be easily removed and replaced at any timewhen the plug is turned in shutoff position. For the purpose of removing the cap'12 the top maybe provided with small slots so that it can be turned with a spanner wrench.

From the foregoing it is thought the construction, op-

eration, and advantages of the invention-will'be obvious to the skilled mechanic or engineer and further explanation is not deemed necessary.

Having thus described my said invention, what I claim as new, and desire to secure by Letters latent of the United States is l. A combined check valve and stop cock comprising a substantially T-sliaped shell having its cross portion interiorly screw threaded, an exterlorly screw threaded hollow plug screwed into the Cross portion of said shell and having a lateral aperture or opening adapted to be moved into and out of alineinent with the third branch or right angularly projecting portion of: said T-shaped shell, said plug having in its exterior a groove or recess, a valve seat in said plug, a check valve in said plug and a set screw in said shell to enter the groove or recess in said plug to lock the latter in an adjusted position.

2. A combined check valve and stop cock comprising a substantially T-shaped shell having its cross portion vertlcally disposed and interiorly screw threaded to a point adjacent to its lower end, an exteriorly screw threaded plug screwed into said shell, said plug having in its lower end a valve seat and in its exterior surface a segmental groove or seat, a check valve in said plug to co-act with said valve seat, a removable cap closing the upper end of the plug and having a projection to limit the opening of the check valve, and a set screw in said shell adapted to enter the groove or seat in said plug to lock the latter in an adjusted position.

3. A combined check valve and stop cock comprising an outer shell or casing having an inlet and an outletduct, a plug removably and adjustably mounted in the shell, said plug having an interior annular enlargement at its lower end to form a valve seat, a removable cap for the plug, said cap having a depending lug formed integral therewith, a valve adapted to rest on the valve seat, said valve having an upwardly extending lug and adapted to contact the lug on the cap whereby the movement of said valve is limited, and legs or guide ways depending from the valve whereby the valve is retained in operative position in the plug, and a set screw passing through an opening in the casing and having its inner end resting in a groove inthe outer face of the plug whereby said plug may be held in adjusted position against accidental removal or displacement.

at. A combined check valve and stop cock comprising an outer shell or easing having an inlet and an outlet duct, a plug removably and adjustably mounted within the casing, said plug having an interior enlargement near its lower end, the upper end wall of said enlargement being slanted to form a valve seat, means for holding the plug in ad justed position in the casing, a cap for the plug, said cap having a depending lug formed integral therewith, a valve slidable in the plug, the outer edge of said valve being slanted to lit the valve seat, said valve having also an upwardly extending lug adapted to engage the lug on the cap whereby thennovement on the valve is limited and means for retaining the valve in operative position when sliding in the plug.

5. A combined check valve and stop cock comprising a substantially T-shaped shell having its cross portion into riorly screw threaded, an exteriorly screw threaded hollow plug screwed into said shell and having a lateral aperture or opening adapted to be moved into and out of alinement with the third branch or right angularly projecting por tion of said T-shaped shell when said hollow plug is rotated in the cross portion of the shell, and -a check valve arranged in said hollow plug.

6. A combined check valve and stop cock comprising a substantially T-shaped shell having its cross portion interlorly screw threaded, an exterior-1y screw threaded hollow plug screwed into said shell and having a lateral aperture or opening adapted to be moved into and out of alinement with the third branch or right angularly projecting portion of said T-shaped shell when said hollow plug is rotated in the cross portion of the shell, a valve seat in said plug, a check valve in said plug to co-act with said valve seat, a closure for one end of said plug and means for lock ing said plug in an adjusted position in said shell.

In testimony whereof I hereunto afiix my signature in presence of two witnesses.

IRWIN W. STEPHENSON.

Witnesses E. H. FINNEY, S. HOLLENBECK- 

